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Third Year > Pattren Develpmont > Flashcards

Pattren Develpmont Flashcards

1
Q

Top takeoff end boot and garbage chute are examples of

A

Triangulated fittings

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2
Q

The hypotenuse is a side on what kind of triangle?

A

Right angle triangle

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3
Q

Pythagorean equation is ?

A

A2 + b2 = c2

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4
Q

A face line is used when a triangulating ______________fitting ?

A. Ships ventilators
B. Right angled
C. Transitional Y branch
D. Top takeoff

A

C. Transitional y branch

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5
Q

A foreshortened line is ?

A

A line that appears to
Be shorter than it really is

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6
Q

A true length triangles horizontal leg is ?

A

A foreshortened dimension

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7
Q

Rectangular transitions are used to retro fit _______ to existing plenum ?

A

New furnace

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8
Q

Can the vertical height of a fitting include seams and allowances ?

A

Yes

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9
Q

Does the face like run 90 degrees to the secondary y branch opening ?

A

No

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10
Q

When determining the vh for a pattern what must be subtracted ?

A

All seams and allowances

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11
Q

Is square to round is on center do u need half pattern or quarter pattern ?

A

Quarter

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12
Q

What are two ways to describe triangulation?

A

Finding the length of a hypotenuse useing the vertical and horizontal legs of a right triangle

Developing the surfaces of fittings with surfaces that slant at diffrent angles

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13
Q

What are lines on the square to round plan view called from b to numbers ?

A

Element lines

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14
Q

What are true length lines ?

A

May be longer than they appear

They are lines that are perpendicular to the viewers line of vision

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15
Q

What is a foreshortened line ?

A

Object, construction or element line that appears to be short than it Accutally is because it is slanting towards or aways from the viewer

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16
Q

What is a True length triangle

A

Right angle trainagle shoes horizontal leg is equal to the length of the foreshortened line (taken from plan view ) and its vertical leg is equal to the vertical height of the fitting

17
Q

What is a face line ?

A

It’s a perpendicular line representing the branch opening for an elbow or y branch

18
Q

When useing the vertical height for triangulation all seams and allowances must be subtracted prior to creating the right angle for determining true length triangles?

True or false ?

A

True

19
Q

What is triangulation ?

A

Method used to develop patterns for irregular shapes and forms which cannot be developed useing parallel or radial line development

20
Q

What is Pythagorean theorem ?

A

It is an equation that recognizes the realationship between the sides of a right angle triangle

A squared + b squared = c squared

21
Q

What is the primary advantage of useing a transitional elbow ?

A

Combined two fittings into one so space materials and fabrication time are all saved

Third Year (10 decks)

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